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Accident # | 80288 |
State Police # | 05-04440 |
Accident Date | 2005-07-04 |
Report Date | 2005-07-11 |
Follow-up Date | 0000-00-00 |
Follow-up: | No |
Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
Nitric Oxide | 1h 5m | Hydrocracker Light Ends Plant Butane Splitter Tower & LEP Depropanizer | NO | YES | NO | 19.0 pounds |
Accident Classified As: Reportable Quantity
LEP Butane Splitter Tower began to overpressure. Moves in operating temperature and pressure on LEP Depropanizer, actuated by the refinery advanced controls system, allowed propane to exit via Depropanizer Bottoms, to the Butane Splitter, which is not designed to off-gas light materials such as propane. Personnel mode moves to lower tower pressure, including the venting of Propane in the Butane Splitter, to the refinery flare system in order to lower the pressure of the tower to safe levels.
Cooler back flushing was conducted in order to ensure that maximum cooling was available. Refinery personnel made operational adjustments that ended the incident. Various level controllers and analyzers associated with the LEP Depropanizer and Butane Splitter were checked for proper operation. The refinery has initiated an investigation into the cause of this incident.
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